Reducing valve for high pressure fluids and connecting means therefor

Claim 2

In a pressure reducing assembly, an inlet port, a pair of valve seats spaced apart axially in said port, a pair of valve elements respectively engageable with said seats simultaneously, spacing means interposed between said elements for spacing them apart a predetermined distance, the clearance between said spacing means and said port being sufficiently small to permit throttling past said means as well as past said elements when the latter are spaced from said seats.

Claim 3

A presssure reducing assembly according to claim 1 wherein said elements are balls and spring means is provided for urging said balls toward said seats at all times.

Claim 4

A pressure reducing assembly comprising: a fitting adapted to be connected to a source of high pressure fluid and formed to provide a discharge port, a normally closed valve in said port, a pressure controller body secured to said fitting and formed with a passageway communicating at one of its ends with said port and formed at its opposite end to provide a cylinder, a piston slidably received in said cylinder, an extension secured at one end to said piston and extending into said passageway to define a space for low pressure throttled fluid between said extension and the walls of said passageway and with said space extending into said cylinder, the free end of said extension extending into said port, a low pressure outlet formed in said body and communicating with said space, resilient force applying means for urging said piston toward said one end and for engaging said fRee end with said valve for opening the latter, whereby the low pressure fluid in said space opposes the force of said force applying means on said piston to position said extension relative to said valve for controlling the flow therethrough, said port comprising a bore formed with a pair of first and second valve seats, a pair of first and second balls adapted to engage said first and second seats respectively, spring means engaging said second ball for urging said balls against said seats simultaneously, said free end of said extension being adapted to engage said first ball to unseat said first and second balls simultaneously against the urgency of said spring means.

Claim 5

A pressure reducing assembly comprising: a fitting adapted to be connected to a source of high pressure fluid and formed to provide a discharge port, a normally closed valve in said port, a pressure controller body secured to said fitting and formed with a passageway communicating at one of its ends with said port and formed at its opposite end to provide a cylinder, a piston slidably received in said cylinder, an extension secured at one end to said piston and extending into said passageway to define a space for low pressure throttled fluid between said extension and the walls of said passageway and with said space extending into said cylinder, the free end of said extension extending into said port, a low pressure outlet formed in said body and communicating with said space, resilient force applying means for urging said piston toward said one end and for engaging said fRee end with said valve for opening the latter, whereby the low pressure fluid in said space opposes the force of said force applying means on said piston to position said extension relative to said valve for controlling the flow therethrough, said port comprising a bore formed with a pair of first and second valve seats, a pair of first and second balls adapted to engage said first and second seats respectively, spring means engaging said second ball for urging said balls against said seats simultaneously, said free end of said extension being adapted to engage said first ball to unseat said first and second balls simultaneously against the urgency of said spring means.

Claim 6

An assembly according to claim 3 wherein a spacer is interposed between said balls.

Claim 7

An assembly according to claim 3 wherein said second ball is of substantially greater diameter than said first ball.

Claim 8

An assembly according to claim 4 wherein said spacer is cylindrical and of slightly less cross sectional extent than said bore to provide a small annular clearance space therebetween for effecting throttling past said spacer.